Active control of airfoils

Abstract

Airfoils for lifting bodies and or propulsion of aircraft, helicopters, air ships, and or ships in or on liquids, etc: A fixed spar aerodynamically and structurally designed for compromise between the minimum and maximum coefficient of friction/drag, lift, propulsion and steering. ( 4 ). On or a part thereof in predetermined areas of airfoils, transducers ( 1,2,3, 1 a, 2 a, 3 a ) are affixed 1,2,3 on one side and 1 a, 2 a, 3 a , on the opposite side or a part thereof. Computer programs and sensors, in cooperation with operator input, Change voltage amplitude and frequencies of specific transducers, altering the airflow, i.e. pitch of designated airfoils at any segment of 0 degrees and or rotation of 0 through 360 degrees of rotation for any required characteristic. This reduces the number and weight of parts.

1 . Variable rotor blades for vehicles comprising: 
 Airfoils having electrical transducers affixed or a part thereof, to there surfaces Varying air flow which effectively alters pitch with out mechanical actuation so as to define various azimuth angles, said azimuth angles comprising an advancing angle between 0 and 180 degrees in one degree segments from direction of flight and a retreating angle between 180 and 360 degrees from direction of flight in one degree segments; said blades receive pitch input electrically to the main blades.    
   
   
       2 . The rotor blades as recited in  claim 1 , further comprising a electrical controller operable to charge each transducer in accordance with programmed motion.  
   
   
       3 . The rotor blades as recited in  claim 1 , further comprising a controller operable to actively vary the intensity and frequency in response to a sensed parameter.  
   
   
       4 . The rotor blades as recited in  claim 1 , wherein said transducers change independently relative to each other without relating movement of one transducer to another to reduce drag and increase lift of the  
   
   
       5 . A method of controlling an airfoils pitch, the pitch having a base position minimum load, said method comprising the steps of: 
 (1) Charging the transducers to define pitch at any azimuth angle, said azimuth angle comprising angles between 0 and 360 degrees.    
   
   
       6 . a method as recited in  claim 1 , wherein said step (2) further comprises: 
 Controlling the pitch in accordance with a prescribed motion schedule.    
   
   
       7 . a method as recited in  claim 1 , wherein said step (2) further comprises: 
 Modifying said prescribed motion schedule in response to a flight condition.    
   
   
       8 . a method as recited in  claim 1 , wherein said step (2) further comprises: 
 Actively controlling the pitch in response to a sensed parameter.    
   
   
       9 . A method as recited in claim  18 , wherein said step (1) further comprises: 
 independently changing the pitch of one blade without relating movement of the pitch to other then the proscribed second blade to reduce drag and increase lift of the airfoil.    
   
   
       10 . a method as recited in  claim 1 , Airfoils for a vehicle comprising: 
 Transducers charged to vary airflow providing pitch to define an azimuth angle, said azimuth angle comprising an advancing angle between 0 and 180 degrees and a retreating angle between 180 and 360 degrees.